Kermit
There are a number of ways of getting the rivet effect. Shy Torque's suggestion works well but needs some form of locating for correct spacing. One way is to obtain or make a dressmaker's tracing wheel - the spikes dent the balsa at regular intervals and you put a spot of PVA at each dent. The same device can be used if you go for more realism by using litho plate cut and glued to correct panel shape but with the rivet lines indented by the wheel before gluing. If you have a printing works near to you, you can probably get all the litho plate you want for free - it gives a super effect. Finally, there's iron-on silver finish plastic coating which is very easy to use and gives a very realistic surface.
Probably worth looking for imported scale model aircraft magazines for available plans.
Final point - having done a bit of a similar project but at 1/5th scale, I found the most difficult thing to get right were the wheels, so I got the wheels first and then scaled the aircraft to suit.
